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Proceedings Paper

Acceleration of the Retinex algorithm for image restoration by GPGPU/CUDA
Author(s): Yuan-Kai Wang; Wen-Bin Huang
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Paper Abstract

Retinex is an image restoration method that can restore the image's original appearance. The Retinex algorithm utilizes a Gaussian blur convolution with large kernel size to compute the center/surround information. Then a log-domain processing between the original image and the center/surround information is performed pixel-wise. The final step of the Retinex algorithm is to normalize the results of log-domain processing to an appropriate dynamic range. This paper presents a GPURetinex algorithm, which is a data parallel algorithm devised by parallelizing the Retinex based on GPGPU/CUDA. The GPURetinex algorithm exploits GPGPU's massively parallel architecture and hierarchical memory to improve efficiency. The GPURetinex algorithm is a parallel method with hierarchical threads and data distribution. The GPURetinex algorithm is designed and developed optimized parallel implementation by taking full advantage of the properties of the GPGPU/CUDA computing. In our experiments, the GT200 GPU and CUDA 3.0 are employed. The experimental results show that the GPURetinex can gain 30 times speedup compared with CPU-based implementation on the images with 2048 x 2048 resolution. Our experimental results indicate that using CUDA can achieve acceleration to gain real-time performance.

Paper Details

Date Published: 25 January 2011
PDF: 11 pages
Proc. SPIE 7872, Parallel Processing for Imaging Applications, 78720E (25 January 2011); doi: 10.1117/12.876640
Show Author Affiliations
Yuan-Kai Wang, Fu Jen Catholic Univ. (Taiwan)
Wen-Bin Huang, Fu Jen Catholic Univ. (Taiwan)

Published in SPIE Proceedings Vol. 7872:
Parallel Processing for Imaging Applications
John D. Owens; I-Jong Lin; Yu-Jin Zhang; Giordano B. Beretta, Editor(s)

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